Blowhole eliminator



Nov. 5, 1940.

J. GLADlcs i 2,220,816

BLOWHOLE ELIMINATOR Filed Nov. 25, 19:58 2 Ysheets-sheet 1 cfviznV @Zadz'c N mv'ENToR ATTORNEYS Nov. 5, 1940.

" J. GLADlcs BLOWHOLE ELIMINATOR 2 Sheets-Sheet 2 INVENTOR ATTORNEYS John ladc I E 5 mfw@ Filed NOV. 25, 1938 Patented Nov. 5, 1940 UNITED STATES PATENT oFFlcE My invention relates to blowhole eliminators and has as one of the principal objects thereof the provision of a blowhole eliminator adapted for association with a mold and equipped with means for effecting a discharge of the gases which accumulate in a mold during the molding operation and which means functions to preclude a blow occurring in a mold during a molding operation and which often results in serious injury to a molder.

Another objectof my invention is to provide a device of the character described equipped with means whereby a molder may readily observe the metal or the like within the mold during a molding operation.

A further object of my invention is to provide a device of the character described which is simple in construction, durable in operation, efficient in use, and economical in manufacture.

An important object of my invention is to provide a device of the character described capable of being operably associated with a mold without modifying the latter.

Other objects and advantages will be apparent from the following description, appended claim and annexed drawings.

Referringv to the drawings wherein like reference characters designate like parts throughout the several views:

Figure 1 is a side elevation of my invention as applied to a mold.

Figure 2 is a sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on 3-3 of Figure 2.

Figure 4 is a detail sectional view taken on the line 4-4 of Figure 3.

Figure 5 is a detail sectional view taken on the line 5-5 of Figure 3.

In the selected embodiment of my invention illustrated in the drawings, my novel form of blowhole eliminator comprises an elongated body 5 fashioned with a top wall 6 integrally connected to depending side and end walls 'l and 8 respectively. The lower ends of the side and end walls are inwardly tapered to provide relatively sharp edges adapted to seat within the upper face of a mass of sand 9 constituting a mold of ordinary construction, said mold being provided with a horizontally disposed mold chamber I in which molten metal is introduced through a feed opening II whereby to effect molding of a desired object within .the chamber IIJ. The chamber I0 has communication with the lower ends of a plurality of gas discharge the line openings I2 extending through the upper wall of themoldj 'and withna centrally' disposed sight opening I3 as yclearly'illiistrated in Figure 3. As heretofore stated, the body is disposed over the mold and the side and end walls I and 8 embrace the outer ends of the openings I2 andA I3. The top wall 6 of the mold is spaced an appreciable distance above the upper face of the mold and coacts with the latter to form a gas receiving chamber therebetween.

The top wall of the body 5 is provided with a series of openings I4, certain of which are closed by removable plates I5. Extending through one of the openings I4 and secured in fixed position therein by means of threaded collars I6 is a threaded nipple I'I, the upper end of which is threaded into the subjacent port of a T connection I8.

A gasket I9 is interposed between one of the collars I6 and the upper face of the body 5 whereby .to effect a tight connection to preclude leakage of gas or the like through said collars.

The T connection I8 is fashioned with the usualv oppositely disposed ports, one of which has threaded therein a plug 28, the latter being formed with a centrally disposed threaded bore in which is .threadedly mounted the discharge end of a compressed air connection 22. The opposite end of said connection 22 is connected to a supply of compressed air` (not shown). rIhe other end of the oppositely disposed port of the T is fashioned with a circumferentially extending ange formed in the outer face thereof with an annular groove which accommodates therein the inner end of a set screw 23 threaded into the flange 24 of an elbow 25 seated on the flange 24. The elbow 25 is adapted for adjustment relative to the T I8 whereby gases discharged through the T I8 into the elbow 25 may be directed away from the body in a desired direction for dissipation. Another of the openings I4 has communication with the lower endv of a tube 26 detachably secured to the upper face of the wall 6 by means of bolts21, a gasket being employed between the tube and upper wall to effect a tight connection therebetween. y

The opening I3 registers with the bore of the tube 26 and the upperend of the tube is closed by a transparent disk 28, preferably constructed of mica, whereby the mold may be readily inspected through the tube 26 and opening I3. The disk 28 is secured on the upper end of the tube 26 by means of a flanged collar 29 threaded thereon as clearly illustrated in Figure 3 of the drawings.

In use, the body 5 is arranged over the mold as heretofore described and as clearly illustrated in Figure 3 of the drawings.` When the body is thus positioned gases rising through the openings I2 and I3 from the mold chamber I0 are propelled upwardly through the nipple l1, T I8 and outwardly through the elbow 25 by means of compressed air discharged into the elbow through the discharge end of the connection 22.

From the foregoing it will be apparent ythat my device provides an efficient means for quickly discharging the gases from the mold chamber, thereby precluding accumulation of the gases therein and which oftentimes when accumulated therein effect a blow resul-ting in a blowholein the mold.

It is obvious that the invention is not confined to the herein described use therefor as it may be utilized for any purpose to which it is adaptable.

It is therefore to be understood that the inven` tion is not limited to the specic construction as illustrated and described, as the same is only illustrative of the principles of operation which are capable of extended application in advance forms, and that the invention comprehends all construction within the scope of the appended claim.

What I claim is:

A device of the character described, comprising, a body having a top wall terminating in depending side and end walls adapted for engagement over a mold and coactng with the latter and said top wall to define a gas receiving chamber completely overlying that portion of said mold in which the mold chamber is' located whereby all gases from said mold chamber are discharged in said gas receiving chamber, said top wall having an opening formed therethrough, a casing mounted on said top Wall and having a passage extending therethrough and communicating with said opening, and an air discharge pipe connected to said casing for discharging air through said passage and withdrawing gases from said mold through said body.

JOHN GLADICS. 

